Er no, if we're going to be exact it's only 1.0414mm if modelling to P4
standards, if working to EM standards it's 1.034mm but if like Simon you're
working on 00 gauge it's 1.026mm with a tolerance of +/- 0.0094mm whereas
of course the tolerance for EM is +/- 0.0008 and for P4 0.0002.
... give or take :-)
All very amusing but unfortunately the original answer is wrong! My
venerable copy of Osborn's Cutting Tool Guide shows No 59 as 1.041 mm. No 60
is 1.016 mm or 0.0400 inches.
If you can't get a No 60 drill I would use a 1.0 mm drill and wiggle it
about a bit :-)
Its ok thanks, as explained in another reply just needed to confirm identy
of metal piece - anyway these locos werent built at Horwich :-)
Simple method of confirming drill bit, drill holes in plastic using range of
bits, insert part into holes till identify minimum bit size.
I remember when metrication came in many years ago, going to a large
ironmonger in Glasgow to get some small drills. I wanted number
drills, but I had made note of equivalent metric sizes just in case.
I asked for my size in number drill and the assistant replied that
they did not sell number drills because of metrication. I then asked
him for the equivalent metric drills, and he said that they didn't
stock them. I then asked him the smallest drill they supplied and he
said "1/64th" ;-)
Just after we went metric I wanted some 5/8" diameter aluminium tube.
The hardware shop would only sell it to me as metric diameter (19mm)
even though it was exactly the same stock as pre-metric.
"What length do you want?"
"I'll take a 2 metre length."
"Sorry, we only sell it in 6' lengths."
That happened with timber as well. I wanted a 6 foot pice of 3"x2". The
guy assured me that they only used metric measure now and I would require
1.8metres. So I painfully calculated the other two measurements in metric
and he said, "Oh you mean 3" x 2" Sir". Shows how long ago it was too, he
called me Sir.
In reality it can't be more accurate than 1.04.
The nearest commonly available metric drill bit would be 1.05mm.
Drilling by any method likely to be available* to Simon would produce an
ap[proximately 1.1mm diameter hole.
Use a 1mm drill bit in a pin chuck, run it through several times and you
will have a 1.1mm hole.
(*Pin chuck, B&D in a drill stand, Dremel etc)
You can still buy "number drills".
Does it need to be a tight fit or loose?
=====================Its for the slide bars to fit cylinder fronts - got to drill slots. The long
bits of metal with square profile included are about a mm thick so parts
dimensions match instructions for these to be slide bars. But crossheads
have 2 outside bits and a spacer piece, recon this will be too narrow for
1mm slide bar. Got chance to assemble crosshead and check/modify slide bar
before things fitted and arkward - another trap avoided :-)
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